A kind of active inorganic anti-corrosion coating for improving the bond strength between steel bar and concrete and its coating method

A technology of bonding strength and anti-corrosion coating, applied in the direction of anti-corrosion coatings, surface pretreatment bonding methods, coatings, etc., can solve problems such as personnel and property losses, and achieve high bonding strength, high adhesion, and construction various effects

Active Publication Date: 2020-08-11
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to the large number of holes, the corrosion resistance of coated steel bars is only 2-3 times that of ordinary uncoated steel bars
[0005] In addition to corrosion, fire and earthquake are the other two major threats to building structures. Although the probability of occurrence is extremely low, once it occurs, it will cause very serious loss of life and property

Method used

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  • A kind of active inorganic anti-corrosion coating for improving the bond strength between steel bar and concrete and its coating method
  • A kind of active inorganic anti-corrosion coating for improving the bond strength between steel bar and concrete and its coating method

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Embodiment 1

[0030] An active inorganic anti-corrosion coating for improving the bond strength between steel bars and concrete, the raw materials include the following components by weight: 165g of phosphorus pentoxide; 100g of nano silicon dioxide; 90g of aluminum oxide; 12g of potassium carbonate, oxidized 22.5g of boron, 34g of sodium carbonate; 4g of nickel monoxide, 7.5g of cobalt monoxide; 15g of dicalcium silicate, 25g of tricalcium silicate, 25g of tricalcium aluminate; wherein said dicalcium silicate, tricalcium silicate, Tricalcium aluminate passed through a 400-mesh sieve.

[0031] A method for coating an active inorganic anti-corrosion coating for improving the bonding strength between steel bars and concrete, comprising the following steps:

[0032] 1) Preparation of coating: Weigh 165g of phosphorus pentoxide, 100g of nano-silicon dioxide, 90g of aluminum oxide, 12g of potassium carbonate, 22.5g of boron oxide, 34g of sodium carbonate, 4g of nickel monoxide, 7.5g of cobalt mo...

Embodiment 2

[0040] An active inorganic anti-corrosion coating used to improve the bonding strength between steel bars and concrete. The raw materials include the following components by weight: phosphorus pentoxide 100g; silicon dioxide 100g, quartz 75g; alumina 25g, nano-alumina 25g; potassium carbonate 16g, boron oxide 40g, chromium oxide 2.5g, vanadium oxide 17.5g, tungsten oxide 5g; nickel trioxide 5g, cobalt monoxide 9g; calcium oxide 15g, calcium silicate 65g; Silicon, quartz, calcium oxide, and calcium silicate pass through a 400-mesh sieve.

[0041] A method for coating an active inorganic anti-corrosion coating for improving the bonding strength between steel bars and concrete, comprising the following steps:

[0042] 1) Preparation of coating: Weigh 100g of phosphorus pentoxide; 100g of silicon dioxide, 75g of quartz; 25g of alumina, 25g of nano-alumina; 16g of potassium carbonate, 40g of boron oxide, 2.5g of chromium oxide, 17.5g of vanadium oxide, tungsten oxide 5g; 5g of nic...

Embodiment 3

[0049] An active inorganic anti-corrosion coating used to improve the bond strength between steel bars and concrete. The raw materials include the following components by weight: 140g of phosphorus pentoxide; 70g of nano-silicon dioxide, 50g of silica; 60g of nano-alumina; Boron 40g, sodium carbonate 11.5g, vanadium oxide 2.5g, nickel monoxide 2.5g; dicobalt trioxide 5g; dicalcium silicate 12.5g, tricalcium silicate 75g, tricalcium aluminate 22.5g, tetracalcium aluminoferrite 8.5 g; wherein the silica, dicalcium silicate, tricalcium silicate, tricalcium aluminate, and tetracalcium aluminoferrite pass through a 400-mesh sieve.

[0050] A method for coating an active inorganic anti-corrosion coating for improving the bonding strength between steel bars and concrete, comprising the following steps:

[0051] 6) Preparation of coating: Weigh 140g of phosphorus pentoxide; 70g of nano-silicon dioxide, 50g of silica; 60g of nano-alumina; 40g of boron oxide, 11.5g of sodium carbonate, ...

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Abstract

The invention discloses an active inorganic anticorrosive coating for improving the bonding strength between a steel bar and concrete. The active inorganic anticorrosive coating comprises the following components in parts by weight: 20-35 parts of phosphorus pentoxide, 20-40 parts of silicon oxide, 10-25 parts of aluminum oxide, 5-30 parts of an active binder, 10-20 parts of a flatting agent and 0-5 parts of an anti-cracking agent. The invention further discloses a coating method of the active inorganic anticorrosive coating for improving the bonding strength between the reinforcing steel barand the concrete. The coating method comprises the following steps: 1) preparing a coating; 2) performing base material treatment; 3) coating; 4) sintering; 5) cooling. The method is simple in process, low in cost and good in corrosion resistance; after the active binder is added, the bonding strength between the coating plain round steel bar and the concrete is 4-8 times that of a common plain round steel bar, and the bonding strength between the coating twisted steel bar and the concrete is 1.5 times or above that of the common twisted steel bar; the dynamic bonding strength between a steelbar coated with the coating and concrete and the bonding strength after high temperature are obviously superior to those of a common steel bar and an epoxy coating steel bar.

Description

technical field [0001] The invention belongs to the field of engineering structures, in particular to an active inorganic anti-corrosion coating for improving the bond strength between steel bars and concrete and a coating method thereof. Background technique [0002] Due to cost advantages, reinforced concrete structures are widely used in large-scale projects such as seaport terminals, offshore platforms, bridges, tunnels, and dams. In seawater and other chloride ion corrosion environments, the corrosion of steel bars has become an important factor affecting the durability of concrete structures. [0003] Epoxy coating is one of the most widely used anti-corrosion coatings for steel bars. Coating the epoxy resin coating on the steel bar surface effectively solves the problem that the steel bar is easy to corrode, and can improve the service life of the building. However, the bond between steel and concrete is the primary factor to ensure that the steel and concrete work ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D5/08C09D7/61C09J5/02C23C24/10
CPCC09D1/00C09D5/08C09D7/61C09J5/02C09J2400/10C09J2400/163C23C24/10
Inventor 钱昊邓嘉华闫东明刘毅
Owner ZHEJIANG UNIV
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